| n. | 1. | (Arch.) A piece of timber laid horizontally, or nearly so, to which the planks of the floor, or the laths or furring strips of a ceiling, are nailed; - called, according to its position or use, |
| v. t. | 1. | To fit or furnish with joists. |
| Noun | 1. | joist - beam used to support floors or roofs |